261933074403 has 96 divisors (see below), whose sum is σ = 492686272512. Its totient is φ = 121550284800.

The previous prime is 261933074363. The next prime is 261933074407. The reversal of 261933074403 is 304470339162.

It is a happy number.

It is not a de Polignac number, because 261933074403 - 2²² = 261928880099 is a prime.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (261933074407) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 450675 + ... + 852627.

It is an arithmetic number, because the mean of its divisors is an integer number (5132148672).

Almost surely, 2^261933074403 is an apocalyptic number.

261933074403 is a deficient number, since it is larger than the sum of its proper divisors (230753198109).

261933074403 is a wasteful number, since it uses less digits than its factorization.

261933074403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402025 (or 402018 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 42.

The spelling of 261933074403 in words is "two hundred sixty-one billion, nine hundred thirty-three million, seventy-four thousand, four hundred three".